Answer:
-4/5
Step-by-step explanation:
Let α and β be the roots of the quadratic equation
ax²+bx+c = 0
Sum of roots α + β = -b/a
Product of roots αβ = c/a
Given the equation 16x²+4x+5 = 0
a = 16, b = 4, c = 5
Sum of roots α + β = -4/16 = -1/4
Product of roots αβ = 5/16
To calculate 1/α + 1/β, we will need to find the LCM first'
1/α + 1/β
= (β+α)/αβ
= sum of roots/product of roots
= (-1/4)/(5/16)
= -1/4×16/5
= -4/5
Answer:
11,7,-3 respectively
Step-by-step explanation:
when x is -2 ,0 and 5 the result will be 11, 7 and -3 respectively
Answer:
Step-by-step explanation:
area=1.8×1.8=3.24 square meters
Brand W : 8.75/10 = 0.875 per oz
brand X : 9.95 / 8.5 = 1.17 per oz
brand Y : 18.25 / 25 = 0.73 per oz
brand Z : 19.48 / 13.5 = 1.44 per oz
so the brand with the lowest cost per oz is brand Y, at 73 cents per oz